Prediction of solar activity on the basis of spectral characteristics of sunspot number [PDF]
Annales Geophysicae, 2004 Prediction of solar activity strength for solar cycles 23 and 24 is performed on the basis of extrapolation of sunspot number spectral components. Sunspot number data during 1933-1996 periods (solar cycles 17-22) are searched for periodicities by ...
E. Echer +4 more
doaj +1 more source
Spot cycle reconstruction: an empirical tool - Application to the sunspot cycle [PDF]
, 2015 The increasing interest in understanding stellar magnetic activity cycles is a strong motivation for the development of parameterized starspot models which can be constrained observationally.
A. R. G. Santos +3 more
semanticscholar +1 more source
Legal restrictions, “sunspots,” and cycles [PDF]
Journal of Economic Theory, 1989 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +3 more sources
DECIPHERING SOLAR MAGNETIC ACTIVITY. I. ON THE RELATIONSHIP BETWEEN THE SUNSPOT CYCLE AND THE EVOLUTION OF SMALL MAGNETIC FEATURES [PDF]
, 2014 Sunspots are a canonical marker of the Sun's internal magnetic field which flips polarity every ∼22 yr. The principal variation of sunspots, an ∼11 yr variation, modulates the amount of the magnetic field that pierces the solar surface and drives ...
S. McIntosh +11 more
semanticscholar +1 more source
Precursors of an upcoming solar cycle at high latitudes from coronal green line data [PDF]
, 2018 After reviewing potential early indicators of an upcoming solar cycle at high latitudes, we focus attention on the rush-to-the-poles (RTTP) phenomenon in coronal green line emission.
Gerják, T. +3 more
core +2 more sources
Differential Rotation for Different-sized Sunspot Groups Early Observed by the OGAUC
The Astrophysical Journal, 2023 Solar differential rotation is an important ingredient of the solar dynamo model, not only because the solar rotation profile is one of the key inputs in a solar dynamo model, but also because it imposes constraints for the solar dynamo model.
Miao Wan +3 more
doaj +1 more source
The lost sunspot cycle: New support from 10 Be measurements [PDF]
, 2014 It has been suggested that the shortage in the number of spots on the surface of the Sun between 1790 and 1830, known as the Dalton minimum, contained an extra cycle that was not identified in the original sunspot record by Wolf.
C. Karoff +4 more
semanticscholar +1 more source
North-south asymmetry in small and large sunspot group activity and violation of even-odd solar cycle rule [PDF]
, 2016 According to Gnevyshev-Ohl (G-O) rule an odd-numbered cycle is stronger than its preceding even-numbered cycle. In the modern time the cycle pair (22, 23) violated this rule.
J. Javaraiah
semanticscholar +1 more source
Long-term solar activity explored with wavelet methods [PDF]
Annales Geophysicae, 2006 Long-term solar activity has been studied with a set of wavelet methods. The following indicators of long-term solar activity were used; the group sunspot number, the sunspot number, and the 14C production rate.
H. Lundstedt +3 more
doaj +1 more source
SUNSPOT SIZES AND THE SOLAR CYCLE: ANALYSIS USING KODAIKANAL WHITE-LIGHT DIGITIZED DATA [PDF]
, 2016 Sizes of the sunspots vary widely during the progression of a solar cycle. Long-term variation studies of different sunspot sizes are key to better understand the underlying process of sunspot formation and their connection to the solar dynamo.
S. Mandal, D. Banerjee
semanticscholar +1 more source